The number of ways in which 20 differently coloured flowers be strung in the form of a garland is

The number of ways in which 7 different coloured flowers be strung in the form of a garland is

The number of ways in which 5 different coloured flowers be strung in the form of a garland is

The number of ways in which 7 different coloured flowers be string in the form of a garland is

The number of ways in which 8 different flowers can be strung to form a garland so that 4 particular flowers are never separated is :

Find the numbers of ways in which 10 different flowers can be strung to form a garland so that 4 particular flowers are never separated.

Find the number of ways in which 8 different flowered can be strung to form a garland so that four particular flowers are never separated.